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Search: id:A084125
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| A084125 |
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Numbers n such that 13*3^n + 2 is prime. |
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+0
2
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| 1, 3, 6, 7, 11, 29, 106, 111, 138, 966, 1203, 2719, 3357, 11445
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OFFSET
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1,2
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COMMENT
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Values corresponding to 29, 106, 111, 138, 966, 1203 and 2719 (1299 digits) have been certified prime with Primo. 13*3^3357 + 2 is a probable prime. There are no other terms <= 6000.
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EXAMPLE
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Primes 41,353,9479,28433 are 13*3^1+2, 13*3^3+2, 13*3^6+2, 13*3^7+2.
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PROGRAM
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(PARI) for(n=1, 6000, if(isprime(13*3^n+2), print1(n, ", ")))
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CROSSREFS
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Sequence in context: A126003 A047556 A015819 this_sequence A053478 A138037 A073934
Adjacent sequences: A084122 A084123 A084124 this_sequence A084126 A084127 A084128
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KEYWORD
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nonn
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AUTHOR
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Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 21 2003
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EXTENSIONS
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11445 (a pseudoprime) from Huseyin Azoguz (huseyin(AT)mmnetz.de), Nov 30 2008
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